This is extremely significant when addressing the concept of DIET where hot electrons are transferred directly to a chemical adsorbate on the surface of the metal nanoparticle and promote subsequent catalytic reactions; in said scenarios, UPS can help image the hybridized metal-adsorbate states (bands) that are formed and analyze interfacial charge transitions ( Figure 8 ).
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Hot Electrons in TiO<sub>2</sub>-Noble Metal Nano-Heterojunctions: Fundamental Science and Applications in Photocatalysis.
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